Screw composed of several parts



Get. 28, 1930. W|NTER\ 1,779,896

SCREW COMPOSED OF SEVERAL PARTS Filed Aug. 14, 1929 imam/07' 61 M44 alotions of conical shape, whilst I Patented Oct. 28, v1930 UNITED STATESnnors wnv'rnn, or .soiionmrz, NEAR AUSSIG, czEonosLovAxrA SCREW COMPOSEDOF SEVERAL PARTS Application filed August 14, 1929, SerialNo. 385,753,and in Germany May 31, 1929.

. The present invention relates to a screw V nut which is composed ofseveral parts and which is prevented from becoming loosewhen in use. n

An example of the invention is shown in the Figures-1+5 of theaccompanying drawit (Figure 1) is the top portion of the nut,

b (Figure 2) are threaded gripping seca (Figure 3 base nut.

(Z (Figure 4) is a longitudinal section showing the fixing of the partsof the nut.

6 (Figure 5) is aplan view of the nut.

First the base nut c is screwed on, then the thread gripping sections 6are inserted in an inner cavity 6 of the same and are so laid round thebolt ehthat their threads engage with the .threads thereof, whereuponthe top nut portion a is screwed in the threaded enlargement 6 (Figure3) of the base nut and is'the lower nut portion or the atthe same timescrewed on the bolt d with 1 its inner thread. The top nut portion a is.down on the gripping sections 0 it presses them firmly into the'threadof the bolt (Fig-. ure 4:) and at the same time all parts are tightlyforced into or against each other thus producing a powerfully increasedfriction also hollowedout conically and when screwed cavity and screwinginto said threaded recess (6) upon being screwed on to the bolt (03) andinternally threaded, externally conical gripping sections (Z2) which areplaced inside said recess and around the thread of the bolt (cl), saidsections being encompassed by ALOIS WINTER.

which makes a loosening of the screw imv possible. Further locking'isensured by arranging in one of the threaded sections, a pin 7, screwadjusted (Figure 4:) and by providing corresponding holes 9 in the topnut portion. The

screwed pinhas a slot adapted to be engaged by a screw driver "throughthe holes so-that the ,pin might be turned. When the top nut 40 portionis tightened up until one ofthe holes therein comes over-the pin, thelatter is turned by a screwdriver until'its head passes into the hole.

Thus a mutual displacement of the parts with respect to eachother isprevented.

What is claimed is: r 1. A screw nut characterized in this, that it isformed of several parts namely a base portion (0) having a threadedrecess (6) a 50 top portion (a) having an internal conical

